EP 0814300 A1 19971229 - Surface light source device and liquid crystal display device using the same
Title (en)
Surface light source device and liquid crystal display device using the same
Title (de)
Oberflächenlichtquelle und diese verwendende Flüssigkristallanzeige
Title (fr)
Dispositif source de lumière de surface et dispositif d'affichage à cristaux liquides utilisant le même
Publication
Application
Priority
- JP 16182596 A 19960621
- JP 16182696 A 19960621
- JP 9889497 A 19970416
- JP 9889597 A 19970416
Abstract (en)
A surface light source device includes a light source (1), a light guide plate (3) for guiding light from the light source to one surface, and a light-condensing member (5) for outputting exit light from the light guide plate (3) in a predetermined direction. The one surface (4) of the light guide plate (3) is a stepped surface whose thickness decreases step by step at a predetermined pitch from one end, at which the light source (1) is arranged, to the other. The light-condensing member (5) is located to face the light guide plate and includes a plurality of prisms (6) for refracting exit light from the light guide plate (3) toward the direction of a normal to the light guide plate (3), and a plurality of lenses (7) for condensing and outputting light in a direction within a predetermined range of angles. <IMAGE>
IPC 1-7
IPC 8 full level
F21V 8/00 (2006.01); G02B 3/00 (2006.01); G02B 5/04 (2006.01); G02B 6/00 (2006.01)
CPC (source: EP KR US)
G02B 3/005 (2013.01 - EP US); G02B 3/0056 (2013.01 - EP US); G02B 3/0075 (2013.01 - EP US); G02B 3/08 (2013.01 - EP US); G02B 5/045 (2013.01 - EP US); G02B 6/0048 (2013.01 - EP US); G02B 6/0053 (2013.01 - EP US); G02F 1/1335 (2013.01 - KR); G02B 6/0016 (2013.01 - EP US); G02B 6/0018 (2013.01 - EP US); G02B 6/0055 (2013.01 - EP US)
Citation (search report)
- [XY] US 2480178 A 19490830 - ZINBERG IVAN H
- [Y] EP 0167721 A1 19860115 - MITSUBISHI RAYON CO [JP]
- [Y] WO 9400781 A1 19940106 - LOCKHEED MISSILES SPACE [US]
- [Y] US 5050946 A 19910924 - HATHAWAY KEVIN J [US], et al
- [X] DE 2736486 A1 19780216 - IZON CORP
- [X] EP 0584545 A1 19940302 - CARELLO SPA [IT]
- [Y] ANONYMOUS: "LENS-PRISM OPTICAL SYSTEM", RESEARCH DISCLOSURE, no. 112, August 1973 (1973-08-01), pages 6 - 7, XP002042362
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0814300 A1 19971229; KR 100237405 B1 20000115; KR 19980079276 A 19981125; TW 346546 B 19981201; US 5914760 A 19990622
DOCDB simple family (application)
EP 97110147 A 19970620; KR 19970026082 A 19970620; TW 86108626 A 19970620; US 87841297 A 19970618